Les Très Riches Heures du Duc de BerryMusée Condé, Chantilly

The Très Riches Heures du Duc de Berry is usually referred to as "le roi des manuscrits enluminés" or "the king of the illuminated manuscripts", but it is also a pinnacle in the entire history of painting.
Commissioned by Jean, Duc de Berry in 1413, it was painted by the Limbourg brothers who left it unfinished at their (and the Duc's) death in 1416.
The Duc Charles I de Savoie commissioned Jean Colombe to complete the painting of the manuscript between 1485-1489.